Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Standardized Enthalpies and Entropies

Standardized enthalpies and entropies for some common substances.

Sponsored Links

Standardized enthalpies and entropies of some common substances:

- s -
- h -
Btu/lbmole RJ/gmole KBtu/lbmoleJ/gmole
Acetylene C2H2 47.97 200.82 97,495 226,757
Benzene C6H6 64.3 269.21 35,653 82,923
n-Butane C4H10 74.1 310.03 -53,627 -124,727
Carbon Dioxide CO2 51.03 213.66 -169,183 -393,492
Carbon Monoxide CO 47.3 197.92 -47,517 -110,516
Ethane C2H6 54.8 229.48 -36,401 -84,662
Hydrogen H2 31.2 130.60 0 0
Methane CH4 44.5 186.19 -32,179 -74,843
Nitrogen N2 45.8 191.56 0 0
Oxygen O2 48.99 205.09 0 0
Propane C3H8 64.47 269.92 -44,647 -103,848
Water H2O 16.72 70.00 -122,976 -286,022
  • equilibrium states at 25oC (77oF) and 1 atm

Go to Standard state and Standard enthalpy of formation for listing of standard enthalpy of formation and standard entrypy for more than 370 inorganic substances.

Sponsored Links

Related Topics

Related Documents

Sponsored Links

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse!

About the Engineering ToolBox!


We don't collect information from our users. Only emails and answers are saved in our archive. Cookies are only used in the browser to improve user experience.

Some of our calculators and applications let you save application data to your local computer. These applications will - due to browser restrictions - send data between your browser and our server. We don't save this data.

Google use cookies for serving our ads and handling visitor statistics. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected.

AddThis use cookies for handling links to social media. Please read AddThis Privacy for more information.


This page can be cited as

  • Engineering ToolBox, (2005). Standardized Enthalpies and Entropies. [online] Available at: [Accessed Day Mo. Year].

Modify access date.

. .


3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Scientific Online Calculator

Scientific Calculator

2 6

Sponsored Links